public class Test3 {

    public static void main01(String[] args) {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("1");
            }
        });
        t.start();
        System.out.println("2");
    }


    public static void main(String[] args) throws InterruptedException {
        Thread t0=new Thread(()->{
            System.out.println("0");
        });Thread t1=new Thread(()->{
            System.out.println("1");
        });Thread t2=new Thread(()->{
            System.out.println("2");
        });Thread t3=new Thread(()->{
            System.out.println("3");
        });Thread t4=new Thread(()->{
            System.out.println("4");
        });Thread t5=new Thread(()->{
            System.out.println("5");
        });Thread t6=new Thread(()->{
            System.out.println("6");
        });Thread t7=new Thread(()->{
            System.out.println("7");
        });Thread t8=new Thread(()->{
            System.out.println("8");
        });Thread t9=new Thread(()->{
            System.out.println("9");
        });Thread t10=new Thread(()->{
            System.out.println("10");
        });Thread t11=new Thread(()->{
            System.out.println("11");
        });Thread t12=new Thread(()->{
            System.out.println("12");
        });Thread t13=new Thread(()->{
            System.out.println("13");
        });Thread t14=new Thread(()->{
            System.out.println("14");
        });Thread t15=new Thread(()->{
            System.out.println("15");
        });Thread t16=new Thread(()->{
            System.out.println("16");
        });Thread t17=new Thread(()->{
            System.out.println("17");
        });Thread t18=new Thread(()->{
            System.out.println("18");
        });Thread t19=new Thread(()->{
            System.out.println("19");
        });



        t0.start();
        t0.join();
        t1.start();
        t1.join();
        t2.start();
        t2.join();
        t3.start();
        t3.join();
        t4.start();
        t4.join();
        t5.start();
        t5.join();
        t6.start();
        t6.join();
        t7.start();
        t7.join();
        t8.start();
        t8.join();
        t9.start();
        t9.join();
        t10.start();
        t10.join();
        t11.start();
        t11.join();
        t12.start();
        t12.join();
        t13.start();
        t13.join();
        t14.start();
        t14.join();
        t15.start();
        t15.join();
        t16.start();
        t16.join();
        t17.start();
        t17.join();
        t18.start();
        t18.join();
        t19.start();
        t19.join();

        System.out.println("ok");
    }
}
